Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c0fdca9ec12cdd…

MALICIOUS

PDF

75.0 KB Created: 2021-05-17 06:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69210f80b9f6f6db1595d64bd4ace2fa SHA-1: 2ef24c21d6d716017235e4ae5e8015371aed7363 SHA-256: 45c0fdca9ec12cdd50f81c45aabbe8921681f675d6eda0b2dd78d0ba6af80370
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation attempt. The primary malicious URL identified is https://lozipotod.ru/strik. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate potential for malicious redirection or content delivery. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/strik?utm_term=ponniyin+selvan+full+book+price
    • https://cdn.sqhk.co/reparepoki/qjige3f/free_las_vegas_style_casino_games.pdf
    • http://muluwusive.22web.org/fuxowamupezixotoxizisujol.pdf
    • http://mirunex.iblogger.org/hazardous_materials_list_template.pdf
    • https://cdn.sqhk.co/baxemazisod/hdDYnkT/abalone_shell_smudging.pdf
    • http://nuzabokazovuwa.iblogger.org/buvinolujefimopali.pdf
    • https://cdn.sqhk.co/kuwusemob/ChJqhfz/maxeruzigijuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/18afe764-910e-4a8d-981e-37e780cd8b80/how_to_restore_an_ipod_nano_with_itunes.pdf
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_91343bd4a78a44d19dbf32428242e1b1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/05b6ed80-d62c-4dcc-9aed-c5d7f29fee8c/best_pema_chodron_quotes.pdf
    • http://bepopesaral.rf.gd/genetica_de_la_anemia_falciforme.pdf
    • http://tuzipani.rf.gd/gifapumot.pdf
    • https://uploads.strikinglycdn.com/files/14201dca-7fcb-4c8c-9c7f-35beae9d4cb2/vodixurozewazijijupusu.pdf
    • https://394fded3-a37f-45fe-8092-07e0884d2d31.filesusr.com/ugd/bdbc91_11f0857f7dc84417859fe4fc2733ccdd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d608d359-2c4a-49dd-ada4-848cf8941dce/nibusogejudekozitenaweta.pdf
    • http://sofidubanelen.epizy.com/67104138282.pdf
    • https://uploads.strikinglycdn.com/files/39c9d186-6b6b-462e-a98f-5f0c60bebe99/carreras_universidad_del_tolima_2020.pdf
    • https://uploads.strikinglycdn.com/files/2ba4350f-615d-4ae5-b34b-a740ed9c94a1/how_to_use_weight_watchers_scale_by_conair.pdf
    • https://uploads.strikinglycdn.com/files/b2bd06af-9d9e-4ff9-90ed-669dd11c9563/41849183974.pdf
    • https://uploads.strikinglycdn.com/files/2bb3ac22-f778-4bd4-9e53-e86ccf0ba56f/how_much_is_a_2013_elantra_worth.pdf
    • http://nonavijewiw.epizy.com/is_333_a_good_or_bad_number.pdf
    • http://beluxupixid.rf.gd/64462630407.pdf
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_9a15786f575b483aac35fc289065d738.pdf?index=true
    • http://sejanaxopuvogiw.epizy.com/73342330157.pdf
    • http://dipuritaxuxok.rf.gd/mubajavazewopuve.pdf
    • https://56c41596-c8b3-4aa7-a075-23c9724d7f97.filesusr.com/ugd/ed77b2_10603ed616bb444091b701e60b08d373.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e596.bin
85a70a6604dee32220ec0fbb3b37f38ba324c5742b18ab8a00ebd0e9424aa3f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE596 5376 bytes
font_01_sfnt_off0000f804.bin
21ddeb21a0de7d4d83fcb9a44e742b26778b0335ae30ee262f30951fe735ed4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF804 11236 bytes

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